The Usage Count is a measure of the level of interest in a specific item on the Web of Science platform. The count reflects the number of times the article has met a user’s information needs as demonstrated by clicking links to the full-length article at the publisher’s website (via direct link or Open-Url) or by saving the article for use in a bibliographic management tool (via direct export or in a format to be imported later). The Usage Count is a record of all activity performed by all Web of Science users, not just activity performed by users at your institution. Usage Counts for different versions of the same item on the Web of Science platform are unified. Usage Counts are updated daily.
Last 180 days. This is the count of the number of times the full text of a record has been accessed or a record has been saved in the last 180 days. This count can move up or down as the end date of the fixed period advances.
Since 2013. This is the count of the number of times the full text of a record has been accessed or a record has been saved since February 1, 2013. This count can increase or remain static over time.